If I may add my two cents, I would go for GPL for PKGBUILDs, as it ensures stuff remains OSS. Though some broader discussion/voting may be good. And a compromise in form of selection from OSS licences when uploading, defaulting to one could not be that hard to implement.
Nicky -- Don't it always seem to go That you don't know what you've got Till it's gone (Joni Mitchell)
